I have also heard that about Pope Pius X and the encyclopedia, but I don't remember where I heard that. I know that one of the posters here, Ambrose also heard this and he said he looked for proof that it was true but could not find any so he concluded that it was probably not true.
Yes, that is correct, I first heard this story about Pope St. Pius. X allegedly being disgusted with modernism in the Catholic Encyclopedia and throwing it on the floor.
I have searched for years for any proof to support this, and I have found none whatsoever.
I also find the story very suspicious because St. Pius X was not a pushover. If he was so disgusted with the work, all he had to do was forbid it to be published, or order it to amended. I find it difficult to believe that he would have just given a work that he saw a infected with modernism a pass and allow it to be published and sold to Catholics all over the English speaking world.
The last problem I have is that Pope St. Pius X could not speak or read English, so how was he able to make this determination in the first place?
This story harms the good names of all of the men who worked so hard to put together the Catholic Encyclopedia. This allegation taints them with modernism, and the supposed disfavor of the great St. Pius X, without even a shred of proof.
I do not trust this story, and unless someone can provide evidence, I do not believe it.